Sherpa Mini Filament Sensor and ECAS housing core (for 4mm, 5mm, 5.5mm ball bearing)

This remix was created specifically to enable adding a pre-extruder toolhead filament sensor and ECAS connector without adding significant height. Bowden path also supported from the ECAS connector down into the body to ensure that MMU units like ArmoredTurtle BoxTurtle will not have obstructions when feeding filament during filament swaps. So far this design been reliable for 100's of swaps and has reliably detected issues with filament load/unload and filament runout.

Two options:

• original "short" one which may require filing or clipping the ends of the M2 screws (or otherwise washers to prevent screws from hitting extruder gears)

• taller which has more support for the Bowden tube leading into the extruder body - this may be more reliable for automatic filament changes

Print at recommended settings from Annex Engineering Sherpa Mini repo. No supports needed, 45º overhang above the D2F switch location, fits all standard Sherpa parts, no additional replacements needed.

NEW:

The 5.0mm and 5.5mm ball bearing version neck is 10 mm longer than standard, but provides ample support for the PTFE tube and allows it to pass fully through the ECAS fitting and close to the sensor ball bearing.

Standard Sherpa Mini BOM plus:

• D2F switch (or D2F-L with lever removed)

• 2x M2x10 self-tapping screws to hold switch

• 4mm Ball Bearing for sensor, or 5mm or 5.5mm based on version

• ECAS press fit connector

The Annex Engineering License also applies: https://github.com/Annex-Engineering/ANNEX-Engineering-License-Agreement